Perhaps you should try some spelling variations:
"hoang van code snippets" » "hang va code snippets", "hoang van de snippets", "hoang van hoe snippets", "hoang van cong snippets", "hoang van code slippers"
"cong cac code snippets" » "cuong cac code snippets", "cong tac code snippets", "cong cau code snippets", "cong cac cong snippets", "cong cac co snippets", "cong cac che snippets", "cong cac code slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("hoang van code snippets") or ("cong cac code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hoang van code snippets") OR ("cong cac code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoang van code snippets ) or ( cong cac code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoang van code snippets") or ("cong cac code snippets"))) or ("locating bug code snippets"))*.